Tickover in Bexleyheath Kent will have stock of what you want. Www.tickover.co.uk

the rear shocks will be the same on the 2.8i and 3.0l assuming its not a mk1 capri. The struts on a 3.0 have different hubs and stub axles but i belive the inserts will be the same. On my MKII 3.0 i run 1.6 laser struts with monroe gas inserts -2" springs 2.8i hubs machined down to fit a caprisport gtr260 brake kit.

and as marco said the mk1 mkII rs struts are the same as 2.8i lasers etc. Except on the 2.8i the lower spring platform is 1 inch lower.